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Robotics Worksheet: Debugging Robot Programs

Robotics lesson 26: Debugging robot programs · Set 679 · 40 questions
TalentJR

Robot tip (Compare and fix one thing): Run it, spot what went wrong, find the buggy line, fix one thing, test again. Wrong side → a turn is the wrong way. Too far or too short → a forward number is wrong. A shape that does not close → the turn should be 360 ÷ sides; a gap → the repeat number should equal the sides.

NameDateTime takenScore ___ / 40
  1. 1.🐞 Why change only one thing at a time when debugging? (a) to save paper (b) to make it slower (c) to confuse others (d) to see what fixed it
  2. 2.🐞 This program should draw a regular square (4 equal sides), but it leaves a gap:
    repeat 2 { forward 10 cm; turn right 90° }
    What should the number 2 after “repeat” be?
  3. 3.🔢 To debug a robot program, which is the FIRST step? (a) spot what went wrong (b) run the program (c) test it again (d) find the buggy line
  4. 4.🔢 To debug a robot program, what comes right after “run the program”? (a) fix one thing (b) find the buggy line (c) test it again (d) spot what went wrong
  5. 5.🐞 A robot starts at (5, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (2, 2). Its program:
    1. forward 2
    2. turn right
    3. forward 3
    It stops at (8, 2) instead. Which line has the bug?     (a) line 1 (b) line 3 (c) line 2
  6. 6.🐞 A robot starts at (4, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 7). Its program:
    1. forward 6
    2. turn right
    3. forward 2
    It stops at (6, 7) instead. Which line has the bug?     (a) line 1 (b) line 3 (c) line 2
  7. 7.🐞 A robot starts at (5, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (4, 7). Its program:
    1. forward 6
    2. turn right
    3. forward 1
    It stops at (6, 7) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  8. 8.🔢 To debug a robot program, what comes right after “find the buggy line”? (a) run the program (b) test it again (c) spot what went wrong (d) fix one thing
  9. 9.🐞 This program should draw a regular octagon (8 equal sides), but it leaves a gap:
    repeat 3 { forward 10 cm; turn right 45° }
    What should the number 3 after “repeat” be?
  10. 10.🔢 To debug a robot program, which comes first: “spot what went wrong” or “test it again”? (a) test it again (b) spot what went wrong
  11. 11.🐞 This program should draw a regular square (4 equal sides), but it leaves a gap:
    repeat 3 { forward 10 cm; turn right 90° }
    What should the number 3 after “repeat” be?
  12. 12.🐞 This program should draw a regular triangle (3 equal sides), but it leaves a gap:
    repeat 2 { forward 10 cm; turn right 120° }
    What should the number 2 after “repeat” be?
  13. 13.🐞 A robot turns the wrong way at every corner. What is the likely bug? (a) battery is too new (b) the floor is clean (c) wheels are too round (d) left and right mixed up
  14. 14.🐞 This program should draw a regular square (4 equal sides), but the shape does not close:
    repeat 4 { forward 10 cm; turn right 120° }
    What should 120 be changed to?
  15. 15.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 72° }
    What should 72 be changed to?
  16. 16.🐞 A robot starts at (5, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (8, 5). Its program:
    1. forward 4
    2. turn right
    3. forward 2
    It stops at (7, 5) instead. Which line has the bug?     (a) line 1 (b) line 2 (c) line 3
  17. 17.🐞 A mistake in a program is called a … (a) loop (b) sensor (c) gear (d) bug
  18. 18.🐞 This program should draw a regular pentagon (5 equal sides), but the shape does not close:
    repeat 5 { forward 10 cm; turn right 120° }
    What should 120 be changed to?
  19. 19.🐞 A robot starts at (5, 2) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (4, 7). Its program:
    1. forward 4
    2. turn left
    3. forward 1
    It stops at (4, 6) instead. Which line has the bug?     (a) line 3 (b) line 1 (c) line 2
  20. 20.🐞 This program should draw a regular hexagon (6 equal sides), but it leaves a gap:
    repeat 4 { forward 10 cm; turn right 60° }
    What should the number 4 after “repeat” be?
  21. 21.🔢 To debug a robot program, which comes first: “run the program” or “find the buggy line”? (a) run the program (b) find the buggy line
  22. 22.🔢 To debug a robot program, which comes first: “fix one thing” or “test it again”? (a) fix one thing (b) test it again
  23. 23.🐞 A robot starts at (4, 2) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (1, 6). Its program:
    1. forward 4
    2. turn right
    3. forward 3
    It stops at (7, 6) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1
  24. 24.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 120° }
    What should 120 be changed to?
  25. 25.🔢 To debug a robot program, what comes right after “fix one thing”? (a) spot what went wrong (b) find the buggy line (c) run the program (d) test it again
  26. 26.🐞 This program should draw a regular hexagon (6 equal sides), but the shape does not close:
    repeat 6 { forward 10 cm; turn right 45° }
    What should 45 be changed to?
  27. 27.🐞 A robot starts at (5, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (2, 5). Its program:
    1. forward 6
    2. turn left
    3. forward 3
    It stops at (2, 6) instead. Which line has the bug?     (a) line 2 (b) line 3 (c) line 1
  28. 28.🐞 This program should draw a regular pentagon (5 equal sides), but the shape does not close:
    repeat 5 { forward 10 cm; turn right 90° }
    What should 90 be changed to?
  29. 29.🐞 A robot starts at (4, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (3, 6). Its program:
    1. forward 7
    2. turn left
    3. forward 1
    It stops at (3, 7) instead. Which line has the bug?     (a) line 3 (b) line 1 (c) line 2
  30. 30.🐞 A robot starts at (5, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (7, 6). Its program:
    1. forward 4
    2. turn right
    3. forward 2
    It stops at (7, 5) instead. Which line has the bug?     (a) line 3 (b) line 2 (c) line 1
  31. 31.🔢 To debug a robot program, which comes first: “test it again” or “fix one thing”? (a) fix one thing (b) test it again
  32. 32.🔢 To debug a robot program, which is the LAST step? (a) run the program (b) test it again (c) fix one thing (d) find the buggy line
  33. 33.🐞 A robot starts at (4, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (6, 6). Its program:
    1. forward 6
    2. turn right
    3. forward 1
    It stops at (5, 6) instead. Which line has the bug?     (a) line 1 (b) line 2 (c) line 3
  34. 34.🐞 This program should draw a regular pentagon (5 equal sides), but it leaves a gap:
    repeat 2 { forward 10 cm; turn right 72° }
    What should the number 2 after “repeat” be?
  35. 35.🐞 This program should draw a regular triangle (3 equal sides), but the shape does not close:
    repeat 3 { forward 10 cm; turn right 72° }
    What should 72 be changed to?
  36. 36.🐞 A robot starts at (4, 1) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (3, 3). Its program:
    1. forward 2
    2. turn left
    3. forward 2
    It stops at (2, 3) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  37. 37.🐞 This program should draw a regular triangle (3 equal sides), but the shape does not close:
    repeat 3 { forward 10 cm; turn right 90° }
    What should 90 be changed to?
  38. 38.🐞 This program should draw a regular square (4 equal sides), but the shape does not close:
    repeat 4 { forward 10 cm; turn right 72° }
    What should 72 be changed to?
  39. 39.🐞 A robot starts at (4, 0) facing north (the second number counts squares up, the first counts squares across to the east). It should stop on the star at (5, 2). Its program:
    1. forward 2
    2. turn right
    3. forward 2
    It stops at (6, 2) instead. Which line has the bug?     (a) line 2 (b) line 1 (c) line 3
  40. 40.🔢 To debug a robot program, what comes right after “spot what went wrong”? (a) test it again (b) fix one thing (c) run the program (d) find the buggy line

Answer key

  1. to see what fixed it
  2. 4
  3. run the program
  4. spot what went wrong
  5. line 2
  6. line 3
  7. line 2
  8. fix one thing
  9. 8
  10. spot what went wrong
  11. 4
  12. 3
  13. left and right mixed up
  14. 90
  15. 60
  16. line 3
  17. bug
  18. 72
  19. line 1
  20. 6
  21. run the program
  22. fix one thing
  23. line 2
  24. 60
  25. test it again
  26. 60
  27. line 1
  28. 72
  29. line 1
  30. line 1
  31. fix one thing
  32. test it again
  33. line 3
  34. 5
  35. 120
  36. line 3
  37. 120
  38. 90
  39. line 3
  40. find the buggy line

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